Farewell! But Whenever-- is a collection of seven poems by Irish poet Thomas Moore. The poems are all about love, loss, and longing, and they are written in a variety of styles, from the playful and lighthearted to the deeply emotional and melancholic. Some of the most famous poems in the collection include "The Last Rose of Summer," "Believe Me, if All Those Endearing Young Charms," and "Oft, in the Stilly Night." These poems have been set to music by many composers, and they continue to be popular today for their beauty and their timeless themes.